mlib_imagecolorerrordiffusionmxn(3mlib) [sunos man page]

mlib_ImageColorErrorDiffusionMxN(3MLIB) 		    mediaLib Library Functions			   mlib_ImageColorErrorDiffusionMxN(3MLIB)

NAME

       mlib_ImageColorErrorDiffusionMxN - true-color to indexed-color or grayscale to black-white conversion, using error diffusion

SYNOPSIS

       cc [ flag... ] file... -lmlib [ library... ]
       #include <mlib.h>

       mlib_status  mlib_ImageColorErrorDiffusionMxN(mlib_image  *dst,	const  mlib_image  *src,  const  mlib_s32 *kernel, mlib_s32 m, mlib_s32 n,
       mlib_s32 dm, mlib_s32 dn, mlib_s32 scale, const void *colormap);

DESCRIPTION

       The mlib_ImageColorErrorDiffusionMxN() function converts a 3-channel image to a 1-channel indexed image, or converts a 1-channel  grayscale
       image to a 1-channel MLIB_BIT image, with the method of error diffusion.

       The src can be an MLIB_BYTE image with 1 or 3 channels. The dst must be a 1-channel MLIB_BIT or MLIB_BYTE image.

       The  colormap  must  be	created  by mlib_ImageColorDitherInit(). It may or may not have a colorcube included. If it does, the colorcube is
       used. Otherwise, the general lookup table included in colormap is used.

       The kernel is required to have the following property:

       kernel[0] = kernel[1] = ... = kernel[m*dn+dm] = 0;
       kernel[m*dn+dm+1] + ... + kernel[m*n-1] = 2**scale;
       scale >= 0

PARAMETERS

       The function takes the following arguments:

       dst	       Pointer to destination image.

       src	       Pointer to source image.

       kernel	       Pointer to the error-distribution kernel, in row major order.

       m	       Kernel width.  m > 1.

       n	       Kernel height.  n > 1.

       dm	       X coordinate of the key element in the kernel.  0 <= dm < m.

       dn	       Y coordinate of the key element in the kernel.  0 <= dn < n.

       scale	       The scaling factor for kernel to convert the input integer coefficients into floating-point coefficients:

		       floating-point coefficient = integer coefficient * 2**(-scale)

       colormap        Internal data structure for image dithering.

RETURN VALUES

       The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_ImageColorDitherInit(3MLIB),   mlib_ImageColorDitherFree(3MLIB),   mlib_ImageColorErrorDiffusion3x3(3MLIB),    mlib_ImageColorOrdered-
       Dither8x8(3MLIB), mlib_ImageColorOrderedDitherMxN(3MLIB), attributes(5)

SunOS 5.10							    10 Nov 2004 			   mlib_ImageColorErrorDiffusionMxN(3MLIB)

Check Out this Related Man Page

mlib_ImageColorErrorDiffusion3x3(3MLIB) 		    mediaLib Library Functions			   mlib_ImageColorErrorDiffusion3x3(3MLIB)

NAME

       mlib_ImageColorErrorDiffusion3x3 - true color to indexed color conversion using error diffusion

SYNOPSIS

       cc [ flag... ] file... -lmlib [ library... ]
       #include <mlib.h>

       mlib_status  mlib_ImageColorErrorDiffusion3x3(mlib_image  *dst,	const  mlib_image *src, const mlib_s32 *kernel, mlib_s32 scale, const void
       *colormap);

DESCRIPTION

       The mlib_ImageColorErrorDiffusion3x3() function converts a true color image to a pseudo color image with  the  method  of  error  diffusion
       dithering.  The	source image can be an MLIB_BYTE or MLIB_SHORT image with three or four channels. The destination must be a single-channel
       MLIB_BYTE or MLIB_SHORT image.

       The last parameter, colormap, is an internal data structure for inverse color mapping.  Create it by calling the mlib_ImageColorTrue2Index-
       Init() function.

PARAMETERS

       The function takes the following arguments:

       dst	       Pointer to destination or destination image.

       src	       Pointer to source or source image.

       kernel	       Pointer to the 3x3 error-distribution kernel, in row major order.

       scale	       The scaling factor for kernel to convert the input integer coefficients into floating-point coefficients:

		       floating-point coefficient = integer coefficient * 2**(-scale)

       colormap        Internal data structure for inverse color mapping.

RETURN VALUES

       The function returns MLIB_SUCCESS if successful. Otherwise it returns MLIB_FAILURE.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+
       |MT-Level		     |MT-Safe			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       mlib_ImageColorOrderedDither8x8(3MLIB),	mlib_ImageColorTrue2Index(3MLIB), mlib_ImageColorTrue2IndexFree(3MLIB), mlib_ImageColorTrue2Index-
       Init(3MLIB), attributes(5)

SunOS 5.10							    10 Nov 2004 			   mlib_ImageColorErrorDiffusion3x3(3MLIB)

Linux and UNIX Man Pages

mlib_imagecolorerrordiffusionmxn(3mlib) [sunos man page]

Check Out this Related Man Page